Now shows on the site
https://mempool.space/ that the minimal fee is 1 satoshi \ byte but still cannot send the transaction - the same error.
Nope, it's not or perhaps their settings is slightly different.
Both Statoshi and my nodes are indicating it to be slightly more than 1.9sat/vbyte. You can check my node's info for something that indicates the default settings and thus the general node population:
http://163.172.57.208/getmempoolinfo.txt.
I would probably expect it to be purged again after the TX volume rises by the mid week, if that happens just broadcast it again. Don't think ~2sat/vbyte has any chance for a confirmation given the current situation.