Quick reply:
At Avast disable SSL scanning at Avast options when you want update Git Bash, then enable it again
Thanks @Leo3487, much appreciated!
That is my plan which I consider as plan B
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Local MITM - which is quite sensitive on its own since you need to trust who is using that technique - should be transparent and not preventing the security of another software e.g. a security update:
Git Bash has a daily update check which cannot work too.
I'm pretty sure that this issue affects even the paid version.
Better reply:
Wait for staff reply
Let's wait
.
TIA,
Matteo