Hello,
Please ignore the I/O error messages like below. These messages are just saying "No floppy device exists."
[ 7.578550] blk_update_request: I/O error, dev fd0, sector 0
It seems an unnecessary driver module is loaded into the Linux kernel but it isn't harmful at all.
BTW, API Portal 4.2.x is already available. I believe it is better to try 4.2.5.4 (latest release) rather than 4.1.
Best regards,
Seiji