Multisite - Wordpress Importer Unavailable

[dtiziani]

I have a multisite installation for wordpress, and I have two users:

• admin - Multisite Administrator
• commonAdm - An administrator of only one of the sites in the network.

Steps to reproduce:

1. When the commonAdm tries to access the Wordpress Importer via Tools -> Importer, no options are shown to him.
2. Then I, as "admin", open the same page, click on Wordpress Importer (just opening the url "/wp-admin/import.php?import=wordpress"
3. After the "admin" access this page, the commonAdm can see and use the Wordpress importer.

It seems that it requires this first access on EVERY single site for it to work, somehow it must be setting a flag, but I couldn't find any documentations regarding this behaviour.

Other information:

• I'm running a Bitnami Wordpress Multisite on AWS EC2, up to date to 4.8.2;
• I'm not sure if the bug is related to Network and Sites or the Importer itself (so I chose the first one)

[realloc]

I tested the ticket and I can confirm that as a Site Admin, you initially get the following content:

Import

If you have posts or comments in another system, WordPress can import those into this site. To get started, choose a system to import from below:
No importers are available.

After the Network Admin installs the WordPress Importer plugin, the Site Admin still gets the same error message. Only after the Network Admin has opened the Importer once does the Site Admin finally gain access to use it.