You will get tons of advise, from resetting your router, to clearing your cache, to deleting your Outfits, to standing on your head while reciting Poe. All of which may be good advise! Some quirks i have found. If this is isolated to one Region - You may have a problem with that Region. Ask the Grid Owner to check the server, or transfer that region to another server temporarily to check. Also I have found On HG-enabled OpenSim grids, local residents are incorrectly getting entries created in the hg_traveling_data table with GridExternalName pointing to their own grid's HG endpoint (e.g.
http://hg.mygrid.com:8002/). This causes OpenSim to treat local residents as Hypergrid visitors to their own grid, resulting in serious user-facing issues. --- When a local resident has one of these stale records, they experience:
Avatar name displayed as HG visitor format — Firstname Lastname@mygrid.com:8002 instead of Firstname Lastname
Crashes on teleport — especially when attempting to reach their own region
Unable to reach own region — teleport fails entirely
Login issues — avatar cannot log in or appear properly
Semi-detachment from grid — avatar appears to partially disconnect after spending time in busy regions
Cannot send messages or use voice in some cases. ----- A Temporary workaround for this is to consult the person who works on your grid and have them Manually delete the stale records: Paste this in the Terminal:
DELETE FROM hg_traveling_data
WHERE GridExternalName LIKE '%yourgridname%';
his immediately resolves all symptoms for affected residents (after they log out and back in). However records re-accumulate within days, requiring regular cleanup.
So, depending on your Opensimulator Version, Your Viewer version, your Operation system, your brand of router, your flavor of fizzy drink you like, it could be a plethora of issues from A-Z. Since I didn't see any of your specs in your OP, we are all just assuming. Try them all!!!!