Dotnet Build Error: Unexpected character '�' - .net-core

Question

When I pull my project from Git into my Ubuntu 20.04 server and try to build the project, I get the following error:
Build FAILED.
/home/brian/Project/Program.cs(15,37): error CS1002: ; expected
Program.cs line 15
using Project.Services.Ingrediënten;
Becomes this on Ubuntu20.04
using Project.Services.Ingredi�nten;
I'm assuming it has something to do with the character 'ë'
However, when I try to build the project on my CentOS8 instance, there is no issue
CentOS8 locale settings:
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=
Ubuntu 20.04 locale settings:
LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=
File encoding on CentOS8
Startup.cs: C++ source, UTF-8 Unicode (with BOM) text, with very long lines
File encoding on Ubuntu20.04
Startup.cs: ISO-8859 text
Am I missing something on the Ubuntu 20.04 instance ? Kind regards