Authentication error. Emails from this account have

Hello,

I have an email address on a site hosted by OVH.
I need to renew my membership every year and this year I forgot to renew it a few days ago, and now I am completely lost.
I check this email with GMAIL.
Now I have the following message:
Authentication error. Emails from this account were last retrieved on March 26.

In the GMAIL settings, if I want to modify the information, I have:

Edit email account
Enter the email settings for infos@XXXXXXXX.fr. Learn more
Email address: infos@XXXX.fr
An error occurred while connecting to pop3.XXXX.fr.
View error information
Username:
infos@XXXXX.fr
Password:XXXXX
POP server:
pop3.xxxxx.fr
Port:
Keep a copy of the retrieved message on the server Learn more
You must always use a secure connection (SSL) when retrieving your emails. Learn more
Add a label to incoming messages:
Archive incoming messages (without going through the inbox)

I am sure of my password, but I still get this error message.
Could you please let me know how I should proceed to receive my emails again at this address?

Thank you in advance.
Have a good weekend
Sincerely

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