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Marta Szymanska 10Marta Szymanska 10 

Help, I am trying to do Customize Record Details with Page Layouts

training but when I wont to edit Page Layouts I got that message 

Unable to Access Page
The value of the "type" parameter contains a character that is not allowed or the value exceeds the maximum allowed length. Remove the character from the parameter value or reduce the value length and resubmit. If the error still persists, report it to our Customer Support team. Provide the URL of the page you were requesting as well as any other related information. 
Shruti khodaboleShruti khodabole
Hi,
Please refer below link
https://trailhead.salesforce.com/en/modules/lex_customization/units/lex_customization_page_layouts

Thanks,
Shruti Khodabole
Salesforce Developer
http://www.zen4orce.com