Random errors when executing c ++ file

I am writing on a C ++ Linux console software with Visual Studio 2019. The software always ran without problems until a few days ago without any changes before an error message was displayed after a short time when running. I restarted the software immediately and everything went against everything. Basically, about 10 seconds after the program starts, either one of the following three error messages occurs or it just works without an error.

Segmentation fault (core dumped)
double free or corruption (fasttop)
Aborted (core dumped)
double free or corruption (fasttop)
double free or corruption (out)
Aborted (core dumped)

I don’t understand that with the best will in the world, after all, the same thing is always being done. I am not allowed to make the source text available here and since I have not yet been able to narrow down the problem, I do not want to ask anyone to read through the whole project. Rather, I would like to know what possible causes of errors could be, so that I can look it up myself. Thanks for suggestions.

Source: Windows Questions C++

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