Where can I find FPDF? "FPDF error: Some data has already been output..." - wordpress

Where is FPDF? I use Wordpress and Go Daddy, I am trying to use this WooCommerce PDF Watermark, and I am getting a fatal error that causes the watermark not to be visible.
The error is below, how can I fix this?
Notice: iconv(): Wrong charset, conversion from UTF-8' to ISO-8859-1//TRANSLIT' is not allowed in /var/www/wp-content/plugins/woocommerce-pdf-watermark/includes/class-wc-pdf-watermarker.php on line 128
Fatal error: Uncaught Exception: FPDF error: Some data has already been output, can't send PDF file in /var/www/wp-content/plugins/woocommerce-pdf-watermark/includes/lib/fpdf/fpdf.php:292 Stack trace: #0 /var/www/wp-content/plugins/woocommerce-pdf-watermark/includes/lib/fpdf/fpdf.php(1081): FPDF->Error('Some data has a...') #1 /var/www/wp-content/plugins/woocommerce-pdf-watermark/includes/lib/fpdf/fpdf.php(1020): FPDF->_checkoutput() #2 /var/www/wp-content/plugins/woocommerce-pdf-watermark/includes/class-wc-pdf-watermarker.php(521): FPDF->Output() #3 /var/www/wp-content/plugins/woocommerce-pdf-watermark/includes/class-wc-pdf-watermark.php(610): WC_PDF_Watermarker->watermark(NULL, NULL, '/var/www/wp-con...', NULL, true) #4 /var/www/wp-includes/class-wp-hook.php(303): WC_PDF_Watermark->maybe_render_preview('') #5 /var/www/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array) #6 /var/www/wp-includes/plugin.php(470): WP_Hook->do_action(Array) #7 /var/www/wp-admin/admin.php(175): do_action('admin_init') #8 {m in /var/www/wp-content/plugins/woocommerce-pdf-watermark/includes/lib/fpdf/fpdf.php on line 292

The server hosting your WordPress site must have the PHP class FPDF installed.
It is generating PDF files free of charge.
That class is one of the requirements of the Plugin "WooCommerce PDF Watermark".
See if you can install it at Go Daddy.
For instance by making FPDF a Composer requirement, if you can use Composer with your hosting package.

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WordPress file showing error doesn't exist in my WordPress folders

A file directory that doesn't exist is causing a fatal error on my website. The funniest thing is that the folder doesn't exist at all. Below is the error code.
Fatal error: Uncaught Error: Call to undefined function wpcf7_include_module_file() in /usr/www/users/firsttyqsc/wp-content/plugins/contact-form-7/modules/constant-contact/constant-contact.php:8 Stack trace: #0 /usr/www/users/firsttyqsc/wp-content/plugins/contact-form-7/load.php(72): include_once() #1 /usr/www/users/firsttyqsc/wp-content/plugins/contact-form-7/load.php(38): WPCF7::load_module('constant-contac...') #2 /usr/www/users/firsttyqsc/wp-content/plugins/contact-form-7/load.php(105): WPCF7::load_modules() #3 /usr/www/users/firsttyqsc/wp-includes/class-wp-hook.php(305): wpcf7() #4 /usr/www/users/firsttyqsc/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array) #5 /usr/www/users/firsttyqsc/wp-includes/plugin.php(474): WP_Hook->do_action(Array) #6 /usr/www/users/firsttyqsc/wp-settings.php(450): do_action('plugins_loaded') #7 /usr/www/users/firsttyqsc/wp-config.php(92): require_once('/usr/www/users/...') #8 /usr/www/users/firsttyqsc/wp-load.php(50): require_once('/usr/www/users/...') #9 /usr/www/users/ in /usr/www/users/firsttyqsc/wp-content/plugins/contact-form-7/modules/constant-contact/constant-contact.php on line 8
To get your site back up and running, rename the contact-form-7 plugin folder in wp-content/plugins/contact-form-7 to contact-form-7-2 for example... This will deactivate the plugin and hopefully restore your site back for troubleshooting later. This 'fix' is will not allow the plugin work right away. I recommend reinstalling Contact Form 7 again to see if you can recover your templates. If you have the same problem again, delete the second install folder labeled 'contact-form-7' for tidiness. At this point you will need to delete the backup folder from before, reinstall again, and re-setup your templates.
There appears to be an issue with the Contact Contact integration for Contact Form 7.

Manually install wordpress locally on windows 10 problem

I'm new to wordpress. I try to install wordpress on windows 10 with Mysql8.0, PHP8.1.0, Apache24 and wordpress5.8.2. At first, the installation process is stuck in creating wp-config.php with the error "PHP Fatal error: Uncaught mysqli_sql_exception: Unknown column 'wp_' in 'field list' in". The wp-config.php is created when i comment the lines 317 to 322 in wp-admin\setup-config.php. I continue to install the wordpress. The next error is:
PHP Fatal error: Uncaught mysqli_sql_exception: Table 'wordpress.qlj_options' doesn't exist in D:\Program Files\Apache24\htdocs\wordpress\wp-includes\wp-db.php:2056
Stack trace:
#0 D:\Program Files\Apache24\htdocs\wordpress\wp-includes\wp-db.php(2056): mysqli_query(Object(mysqli), 'SELECT option_v...')
#1 D:\Program Files\Apache24\htdocs\wordpress\wp-includes\wp-db.php(1945): wpdb->_do_query('SELECT option_v...')
#2 D:\Program Files\Apache24\htdocs\wordpress\wp-includes\wp-db.php(2581): wpdb->query('SELECT option_v...')
#3 D:\Program Files\Apache24\htdocs\wordpress\wp-includes\functions.php(1734): wpdb->get_var('SELECT option_v...')
#4 D:\Program Files\Apache24\htdocs\wordpress\wp-includes\load.php(752): is_blog_installed()
#5 D:\Program Files\Apache24\htdocs\wordpress\wp-settings.php(159): wp_not_installed()
#6 D:\Program Files\Apache24\htdocs\wordpress\wp-config.php(97): require_once('D:\\Program File...')
#7 D:\Program Files\Apache24\htdocs\wordpress\wp-load.php(50): require_once('D:\\Program File...')
#8 D:\Program Files\Apache24\htdocs\wordpress\wp-admin\install.php(36): require_once('D:\\Program File...')
#9 {main}
thrown in D:\Program Files\Apache24\htdocs\wordpress\wp-includes\wp-db.php on line 2056
It seems to require database before creating it. I think this error is the same with the first.
Can anyone please help?
I am so excited that i installed the wordpress. Here is what i did. First, I manually created all the default tables that wordpress needs in database(you can find the sql in wp-admin/includes/schema.php), then i tried to repair the database using url wp-admin/maint/repair.php. It showed so many deprecated errors and warnings of PHP. So i thought maybe the version of PHP is not right. I tried to use PHP-7.4.27 instead of PHP8 and deleted all the tables created before. Then everything just done.
My English is not very good. I hope you can understand what i'm saying.
enter image description here

A fatal error when viewing a 'draft' post in wordpress dashboard

The fatal error appears when I wish to preview a drafted post. I have no idea what could have possibly started this error. I will post below the entire code I see.
Fatal error: Uncaught Error: Call to a member function format() on
boolean in
/homepages/7/d680526825/htdocs/clickandbuilds/nouveautycoon/wp-content/plugins/td-cloud-library/state/single/tdb_state_single.php:777
Stack trace: #0
/homepages/7/d680526825/htdocs/clickandbuilds/nouveautycoon/wp-content/plugins/td-cloud-library/shortcodes/single/tdb_single_date.php(130):
tdb_state_single->{closure}() #1
/homepages/7/d680526825/htdocs/clickandbuilds/nouveautycoon/wp-content/plugins/td-cloud-library/shortcodes/single/tdb_single_date.php(130):
Closure->__invoke() #2
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tdb_single_date->render(Array, '') #3
/homepages/7/d680526825/htdocs/clickandbuilds/nouveautycoon/wp-includes/shortcodes.php(325):
td_global_blocks::proxy_function(Array, '', 'tdb_single_date') #4
[internal function]: do_shortcode_tag(Array) #5
/homepages/7/d680526825/htdocs/clickandbuilds/nouveautycoon/wp-includes/shortcodes.php
in
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on line 777 There has been a critical error on your website.
Learn more about debugging in WordPress.
Any help, will be greatly appreciated.
Thanks.
P.S. - the theme used is called newspaper and is by tagdiv.
https://nouveautycoon.comis the website in question
Updating the TDCloud Plugin Plugin should do the job. Or downloading a fresh copy and overwrite the files.

Wordpress Fatal error

I'm new to wordpress, I got this error when trying to update style.css in wordpress theme, i don't think css cause the crash please help me what cause this problem:
Fatal error: Uncaught Error: Class 'td_mobile_theme' not found in
/home/staging/www/wp-content/themes/Newspaper/mobile/includes/td_global_mob.php:20
Stack trace: #0
/home/staging/www/wp-content/themes/Newspaper/mobile/functions.php(8):
require_once() #1 /home/staging/www/wp-settings.php(424):
include('/home/staging/w...') #2 /home/staging/www/wp-config.php(92):
require_once('/home/staging/w...') #3
/home/staging/www/wp-load.php(37): require_once('/home/staging/w...') #4 /home/staging/www/wp-blog-header.php(13): require_once('/home/staging/w...') #5 /home/staging/www/index.php(17):
require('/home/staging/w...') #6 {main} thrown in
/home/staging/www/wp-content/themes/Newspaper/mobile/includes/td_global_mob.php
on line 20
It appears you're either missing a plugin or it has been deactivated.
From looking at the error message and searching for unique terms, I guess you have the Newspaper-Theme installed. Their website mentions "tagDiv Mobile theme" as an optional plugin. Maybe your theme has been modified so that it's no longer optional but required?
See if that plugin is installed and activated.

Fatal error: Uncaught Error: Function name must be a string in:..wp-content\themes\jupiter\framework\admin\generators\option-generator.php:80

I developed a theme for my woocommerce store locally through jupitor wordpress them, xampp. Now I have installed wordpress on a server, and integrated the theme I developed. I get this error when i open theme option page:
Fatal error: Uncaught Error:
Function name must be a string in
H:\root\home\amanantru3-001\www\mydesign\wp-content\themes\jupiter\framework\admin\generators\option-generator.php:80
Stack trace: #0
H:\root\home\amanantru3-001\www\mydesign\wp-content\themes\jupiter\framework\admin\generators\option-generator.php(9):
mkOptionGenerator->render() #1
H:\root\home\amanantru3-001\www\mydesign\wp-content\themes\jupiter\functions.php(253):
mkOptionGenerator->__construct('Jupiter_options', Array) #2
H:\root\home\amanantru3-001\www\mydesign\wp-includes\plugin.php(524):
Theme->_load_option_page('') #3
H:\root\home\amanantru3-001\www\mydesign\wp-admin\admin.php(222):
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H:\root\home\amanantru3-001\www\mydesign\wp-content\themes\jupiter\framework\admin\generators\option-generator.php
on line 80
Also, my visual composer is not working on the server now.
Please help me...
Please check that an array is used as function name in the file.
You can check the same error reported here:
Wordpress Theme admin panel showing fatal error in local server

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