I found the solution for me. I had that error for months and finally figured out by asking here on Steemit what is wrong:
You need to log out and manually log in. (DONT USE steemconnect). This completely removed this issue for me and I am sure it is the same case for you. Try it out mate, I am almost certain it will fix your problem!
Ah, I had seen that method before. But I kept logging back in with steemconnect. Ugh. I hate putting my password directly into different sites. Seems so insecure.
Use your posting key. Even if people would misuse it they cannot access your wallet :)
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