Today Myibidder missed bidding on an item I had sniped & I lost the auction. The message was 'refused login (password problem?)
I have not changed my eBay password or ID and both the latter still work normally on my laptop for signing in to my eBay account & to Myibidder
The item no. was 261266062272. There was 1 other bid for $7.99. My maximum bid was $15.56. Snipe set at 3 seconds.
So I should have won this snipe.
Please advise me what the solution is to this problem.

There was some issue on eBay. It was working very slow or not responding properly around that time.
I was browsing it and I was getting some random errors and misbehaviors.
It seems like it was resolved already.

I'm sorry it affected your snipe. Unfortunately, there is nothing sniper could've done in this case.
I hope you'll find the same or better deal on the same item.

Any updates to this? I am getting the same thing, but not isolated. Checked user name and password and it's all good.

If you refer to the originally described item number, there is nothing to update because the listing is ended.
If you refer to a new one, please provide the item number.