Plugin problem after the release of the update

Hello good time
I released my plugin, then I released a new version of it, when users install my plugin they get an error.

After checking, I noticed that a dot (.) Was added to the beginning of the main file of my plugin, causing an error.
I did not add this point, but this point exists when the direct user installs the plugin through the dashboard. But if we download the plugin, this point does not exist.
What is the cause of this problem?