Hello
I am configuring i-doit open with the following configuration

Compatibility check
Operating System: Linux
version: 4.18.0-147.5.1.el8_1.x86_64 # 1 SMP Tue Jan 14 15:50:19 UTC 2020

PHP version 7.3.5 (PHP 7.3 recommended)
MariaDB version 10.3.17 (MariaDB 10.4 recommended)

PHP Settings
magic_quotes_gpcOFF
max_input_vars10000
post_max_size128M

PHP Extensions
session Used by CMDB OK
zlib Used by CMDB OK
mysqli Used by CMDB, JDisc Connector, LDAP, open, Search OK
pcre Used by CMDB OK
xml Used by CMDB OK
json Used by CMDB, JDisc Connector, LDAP, open, Search OK
spl Used by CMDB, JDisc Connector, LDAP, open OK
mbstring Used by CMDB OK
ldap Used by LDAP OK
sockets Used by Monitoring OK

Apache modules
mod_rewrite Used by CMDB, List edit, Search OK Test
i-doit
Current version 1.14.1
Current revision 202011401

And when I am registering the LDAP server and I do the test it returns the following message

Error!

LDAP Bind failed (Can't contact LDAP server). Host: ADEMPRES.EMPRES.LOCAL:389. User: CN=PRUEBASOWA,OU=PruebaGPO,DC=EMPRES,DC=local

Instead if I force a synchronization of ldap from console if it works correctlym returning the following messages:

[root@servidor html]# sudo -u apache php console.php ldap-sync -u admin -p Password -v
Uses LDAP Tenant settings
Syncing LDAP-Server ADEMPRES.EMPRES.LOCAL (Active Directory)
User CN=ADMINI,CN=Users,DC=EMPRES,DC=local synchronized.
No deleted users found.
Found 1000 disabled object(s) inside dc=EMPRES,dc=local.
User '$SK8200-HHCPLUV4T50C' d.
User 'SM_5245af7499804bb0b' d.
User 'Invitado' d.
User 'krbtgt' d.
User 'DefaultAccount' d.
Regenerating search index..
Start Indexing!

Retrieving data for C__CATG__CONTACT
Retrieving data for C__CATG__IP
Retrieving data for C__CATS__CLIENT
Retrieving data for C__CATS__PERSON_GROUP_MASTER
Retrieving data for C__CATS__PERSON_MASTER
Start reading 1 rows for C__CATS__PERSON_MASTER
1/1 [============================] 100% < 1 sec 52.0 MiB
Finished reading 1 rows

Start mapping 1 rows to 25 documents for C__CATS__PERSON_MASTER
25/25 [============================] 100% < 1 sec 52.0 MiB
22 of 25 documents were skipped!

Start overwriting documents
3/3 [============================] 100% < 1 sec 52.0 MiB
Finished overwriting documents!

Finished indexing!

1 rows got read!
25 documents got mapped!
22 documents got skipped while mapping, because of empty data!
3 documents got overwriting!
0 documents of inserted documents got updated instead, because they already existed!
Regenerated search index!

I don't know where the error may be when configuring authentication.