Qt platform plugin could not be initialized - PDFlatex and/or MikTex problem

[lemelinm]

Hello community,
I am using Texmaker 5.1.4 (the latest) under Windows 11 x64. In the writing of an article, I have to use the latex command \oint (symbol of a contour integral for those who knows). Texmaker does not have that command. So I have to relay to use another package, namely \usepackage[intlimits]{esint}. That the only way to use \oint. But by doing so, I receive this error:

I have explored the Web to find a solution. I even installed Qt 6.7.2. But since I am not a developer, I must say that I am stuck there and have absolutely no idea on how to make it work.
Hello community,
I am using Texmaker 5.1.4 (the latest) under Windows 11 x64. In the writing of an article, I have to use the latex command \oint (symbol of a contour integral for those who knows). Texmaker does not have that command. So I have to relay to use another package, namely \usepackage[intlimits]{esint}. That the only way to use \oint. But by doing so, I receive this error:

I have explored the Web to find a solution. I even installed Qt 6.7.2. But since I am not a developer, I must say that I am stuck there and have absolutely no idea on how to make it work.

Is there someone kind enough to help me make it work. Because I know latex but I never use any other latex software to write article and other documents. I thank you in advance for your help.
Mario

[msk-nightly]

Try the solution(s) suggested here.