Problem creating installer file

Hello,
I have been successfully using Duplicator in the past year and this is a fantastic plugin. However, I just upgraded WP and Duplicator yesterday to the newest versions and have the following problem while attempting to create a package:
Error Message: Build Interrupt
Server Status: 200 -OK
Error Message:
Build Folder: …/wp/wp-snapshots/tmp
Some servers close connections quickly; yet the build can continue to run in the background. To validate if a build is still running; open the ‘tmp’ folder above and see if the archive file is growing in size. If it is not then your server has strict timeout constraints. Please visit the support page for additional resources.

I know it looks like there is a timeout issue, so I checked all timeout parameters and they all look ok. I have introduced filters such that the build takes less than 3 seconds, and the problem persists. There is absolutely no difference in the log file if the build takes 10s or 2s.

The log file ends with (I replaced the sensitive data by “…”):
********************************************************************************
ARCHIVE (ZIP):
********************************************************************************
ARCHIVE DIR: /…/wp
ARCHIVE FILE: …_archive.zip
FILTER DIRS: …/wp/wp-content;
FILTER EXTS:
—————————————-
SCANNING
FILTERS *ON*
Items archived [1068] flushing response.
– filter@ […/wp/wp-content]
STATS: Dirs 103 | Files 992 | Links 0
SIZE: 15.3MB
TIME: 1.50 sec.
—————————————-
COMPRESSING
SQL ADDED: …_database.sql

I have checked that the zip extension is included in the PHPini and it is there.

In the wp-snapshot/tmp directory, I find the files …_database.sql and the …_archive.zip. I am able to unzip the _archive.zip and in fact everything is there with the correct file/dir sizes. The install file is missing however both in the wp-snapshot and the wp-snapshot/tmp. I can’t find it anywhere.

It seems that the problem is encountered upon building the install file. Any help would be much appreciated. If anything, could you let me know how to build the install file manually?

Thanks very much!

https://wordpress.org/plugins/duplicator/