PHP UConverter class is missing, it's provided by the Internationalization (intl) module

I installed Tiny Tiny RSS and i get this error:
PHP UConverter class is missing, it’s provided by the Internationalization (intl) module.
The intl module is enabled but still gives this error in both php versions 5.6 and 7.3 .
Do you have any solution to fix this error?

Funny thing. I just did a search for ‘PHP UConverter class is missing’. First search link was this ==> New error on restart - 'PHP UConverter class is missing' - Tiny Tiny RSS: Community . Maybe you should read through that thread for clues?

btw, speaking of clues, you have given no clue as to your install, docker or not, what OS, etc., etc. This may not go well for you?
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I solved.
I copied all icu****.dll files from php folder to \apache\bin folder
and now the error no longer occurs.