Persistant Error on my site: Punycode label

When I open my logs it is basically pages and pages of this error:

Exception Occurred: /home/mywebsite/public_html/updates/concrete5-8.2.1_remote_updater/concrete/vendor/true/punycode/src/Punycode.php:84 The length of any one label is limited to between 1 and 63 octets, but 0 given. (0)

Can someone explain to me what this means please? Thanks

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MrKDilkington replied on at Permalink Reply
Hi wilfordbrimley,

When did the error start displaying?

The error appears related to Punycode.
"A Bootstring encoding of Unicode for Internationalized Domain Names in Applications (IDNA)."

Do you have an internationalized domain name or domain name with special characters, etc?
wilfordbrimley replied on at Permalink Reply
Thanks, it's just a regular domain, i.e. It looks like the first occurrence was on Sept. 7th. It always occurs with 'Guest' users. I can't personally seem to replicate the issue anywhere when logged out.