Loading mails

I have Windows 11 on PC.
I installed Mailspring and bought already… I have totally 7 mail addresses… Microsoft, Google etc and some of them is another mail adresses.
Normally it works without problem but one of email (which is company mail address) does not load and keep says “loading messages”, when first i setup that mail was works well but after i paid and reload Mailsprings it started that problem… How can I solve that?