In rare cases the publication of website can take a lot of time and end with error "Operation timeout, try again later" (in this case publication may take up to 2 hours). Unfortunately, this error does not provide any details, but the sure thing is that something disturbed publication process and it just stopped in the background, leaving the client to wait without any progress.

Click Preview button in website builder and check if website is previewed properly. If it ends with an error, contact us in support by creating a ticket and specify the error you see. If the preview is loaded properly, most probably the problem occurs due to lack of RAM on server that is dedicated for PHP processes for website builder (parameter "memory_limit"). Note that even though the recommended value for website builder installation is 256M, sometimes it may not be enough.

To fix the problem you may try the following:

Only for On-Premises website builder:

• Add config "noShutdownFuncFork": true, into website builder configurational file "config.json". With this config, website builder will use different methods for website generation that require much less memory.
• If (1) did not help, then increase limit of memory dedicated for PHP (parameter "memory_limit"). Unfortunately, it is not known to what value the parameter should be increased, because it primarily depends on the number of pages of published website. Roughly speaking, for ~100 pages of website the value must be not less than 256M.
  
• Update website builder to the latest version and then check publication.

For Cloud and On-Premises website builder:

• (only for website builder v3) The combination of many pages on website (more than 100) and enabled Auto Layout option may require much more RAM for website generation during publication. If there are more than 100 pages, then we recommend you to turn off option "Auto Layout" and use 4 standard methods (Wide, Desktop, Tablet, Phone).
  
• During long website creation/maintenance, there can be many unneeded (outdated) pages left in website builder with time. Remove all unused pages and try to publish website again.