I hunted this down and found the code in the steeem source code.
I removed the assertion code there but the same error message appeared. Probably my mistake.

It takes so long time to build the steem source on arm (not on rpi but on x86 pc with docker buildx).

The code that I commented out is this:

// /libraries/protocol/asset.cpp
void asset::validate()const
{
//   symbol.validate();
   FC_ASSERT( amount.value >= 0 );
   FC_ASSERT( amount.value <= STEEM_MAX_SATOSHIS );
}

Thank you for your comment.