As @VoIP-Buddy and @johnk3r wrote, on Comware BAGG configuration order (steps) is truly important (as example, statements like "When configuring a link aggregation on A-Series switches (Comware) the order of execution is very important. The following are the configuration steps." are not so unusual on HPE KB articles about Comware and LAG/BAGG setups).
Just a reference here (not the only one the OP can look for), note the example for the Comware based Switch configuration part:
***** link aggregration configuration *****
When configuring a link aggregation on A-Series switches (Comware)
the order of execution is very important. The following are the configuration steps.
1. Create the link aggregation interface
2. Associate the member ports to the aggregation interface
3. Make any additional changes to the link aggregation
Step One: Create the link aggregation and set the mode to dynamic (LACP)
[Rack4sw1]interface Bridge-Aggregation 12
[Rack4sw1-Bridge-Aggregation12] link-aggregation mode dynamic
Step Two: Associate the the member ports
[Rack4sw1]interface GigabitEthernet2/0/7
[Rack4sw1-GigabitEthernet2/0/7]port link-aggregation group 12
[Rack4sw1]interface GigabitEthernet2/0/8
[Rack4sw1-GigabitEthernet2/0/8]port link-aggregation group 12
[Rack4sw1]interface GigabitEthernet2/0/9
[Rack4sw1-GigabitEthernet2/0/9]port link-aggregation group 12
[Rack4sw1]interface GigabitEthernet2/0/10
[Rack4sw1-GigabitEthernet2/0/10]port link-aggregation group 12
Step Three: set the port link type to trunk and permit vlans
[Rack4sw1]interface Bridge-Aggregation 12
[Rack4sw1-Bridge-Aggregation12]port link-type trunk
[Rack4sw1-Bridge-Aggregation12]port trunk permit vlan 1 100 to 105
Then troubleshooting BAGGs should be done using display related commands (such as display link-aggregation verbose just to start with)...at least this on Switch side.
Server side requires the same level of troubleshooting but necessary tools (CLI commands or GUI based configurations) depend strictly on the underlying OS used: in any case the Server side BAGG's configuration should be the same used Switch side.