To clarify a bit:
I’ve tried everything what I’ve already mentioned here: How to avoid an exception Prematurely reached end of stream using mongoDB Java driver 3.4+ or 3.6+? (during insertion) - Stack Overflow
as you can see my post above.
My Network Access looks like:
Also I can’t provide any logs, because:
“M0 Free Tier and M2/M5 shared clusters do not provide downloadable logs.”