I also just found these errors:

[JavaScript Error: "Attempting to use a disconnected port object" {file: "extensions::messaging" line: 72}]

[JavaScript Error: "Attempting to use a disconnected port object" {file: "extensions::messaging" line: 72}]

[JavaScript Error: "OAuth access failed with 400; response was oauth_problem=parameter_absent&oauth_parameters_absent=oauth_consumer_key%26oauth_signature%26oauth_signature_method%26oauth_nonce%26oauth_timestamp%26oauth_token"]

[JavaScript Error: "Translate: Authentication failed with message An invalid response was received from the Zotero server"]

[JavaScript Error: "Save to server failed" {file: "chrome-extension://ekhagklcjbdpajgpjgmbionohlpdbjgc/zotero/connector/translate_item.js" line: 198}]

[JavaScript Error: "OAuth request failed with 400; response was oauth_problem=parameter_absent&oauth_parameters_absent=oauth_consumer_key%26oauth_signature%26oauth_signature_method%26oauth_nonce%26oauth_timestamp"]

[JavaScript Error: "Translate: Authentication failed with message An invalid response was received from the Zotero server"]

[JavaScript Error: "Save to server failed" {file: "chrome-extension://ekhagklcjbdpajgpjgmbionohlpdbjgc/zotero/connector/translate_item.js" line: 198}]

[JavaScript Error: "OAuth request failed with 400; response was oauth_problem=parameter_absent&oauth_parameters_absent=oauth_consumer_key%26oauth_signature%26oauth_signature_method%26oauth_nonce%26oauth_timestamp"]

[JavaScript Error: "Translate: Authentication failed with message An invalid response was received from the Zotero server"]

[JavaScript Error: "Save to server failed" {file: "chrome-extension://ekhagklcjbdpajgpjgmbionohlpdbjgc/zotero/connector/translate_item.js" line: 198}]

[JavaScript Error: "OAuth request failed with 400; response was oauth_problem=parameter_absent&oauth_parameters_absent=oauth_consumer_key%26oauth_signature%26oauth_signature_method%26oauth_nonce%26oauth_timestamp"]

This is trying to log into your Zotero account but either something is going wrong or you're not authenticating it.
If you have Standalone open while trying this, things should work. You'll also get better results on import.