I have had up to 8 git bash terminals running at the same time before.
Currently I have only 2 up.
I have not seen this error before and I am not understand
In my case, it was related with the use of VS code. Previously I have opened VS code using a git bash terminal and executing
code .
then closing the terminal.
The problem is solved by closing all the VS code windows opened.
When you have any editor or IDE configure to open a terminal as git bash, then when the IDE/IDE is running, the git bash will spin up bash from "C:\Windows\System32\bash.exe" and any other attempt to open bash from a separate window is likely to crash.
The best solution is to kill the IDE/Editor bash and open from a new window or continue from the IDE/Editor command.