That's it... I think I understand you! 
No problem - I use cerbot 
ps: for me it makes no fundamental difference than receiving a ssl, because it does not solve the main problem
If you can run certbot directly, try adding that setting on the command line.
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To solve that main problem, you need access to device:
OR to someone that can control it.
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If I understand you correctly, then the problem is in the equipment and routing of my provider...
Thank you for your response!
the question can probably be closed
It is NOT routing; But, yes, the problem is within the equipment:
As mentioned before:
As proof of that, I mentioned that you could test with:
Which would show that your certbot is NOT part of the problem.
[and obtain a valid LE cert along the way]
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I see the following line twice:
:::defconf drop invalid
I would like to know what mikrotik thinks about being "invalid". Could you extract this information, please?
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