Hi ​@mareks30514 - thanks for reaching out!

The first thing I recommend with these types of errors is clearing your browsers cache and cookies. Sometimes stored information can cause issues when websites try and load, so clearing it is a good step. You can read the walkthrough for this here: How to Clear the Cache and Cookies in Your Web Browser

You can also test this by logging in through a different web browser, or using an incognito window - Let me know if this works at all!

Hello,thanks! I tried this , but unfortunately it doesn't helped!

Just to confirm, you’ve also tried through another web browser? 

Could you send me a screenshot of the error you’re seeing as well? I can take a closer look from there.

It looks like you’re making these changes through the Calendly App - If you do this through the web browser, does it allow you to adjust the times?

I’d also check if the Calendly app has any updates available. Let me know if this works.

How can I adjust times through calendly web site ?

We have a few articles on this here, but after you log into calendly.com, you’ll have access to adjust your availability schedule OR changing the availability within specific events. I’ll leave some articles below that will walk you through it!

• How to change your Availability Schedule
• If you’d like to adjust an event specifically, you’ll need to edit the event, select Scheduling Settings, then select hours and calendar settings:

  

  

Let me know if you have any questions.