Login Error - A server error (415) occured. Retrying

[clerencepower]

I am having a problem logging in:

A server error (415) occured. Retrying...
Error page: https://api.500px.com/v1/session

Thanks for helping!

[daler445]

500px api is no longer free of charge.

Ref. to https://support.500px.com/hc/en-us/articles/360002435653-API-

[clerencepower]

500px api is no longer free of charge.

Ref. to https://support.500px.com/hc/en-us/articles/360002435653-API-

Thanks for that explanation. But it worked for me until last week. Do you have an explanation for that?

[Nighty93]

Is there any way to fix this? I am also getting this error.