Troubleshooting

Nothing is highlighted

Work down this list:

Is RM enabled? /rm enable, or tick Enable in General.
Is a rotation active? /rm current names it. If none is, see Switch conditions.
Is the action on your action bars? Highlights appear on action bar buttons. Turn on Preview Spells in General to see recommendations even if they are not on your bars.
Is bar highlighting turned off? Untick Disable Bar Highlighting.
Can the action be used right now? RM skips spells you have not learned, cannot afford, are on cooldown or out of range, and items you are not carrying.
Do the card's conditions match? Open the rotation; with live status on, each card shows whether its conditions are currently satisfied.
Is the rotation valid? A red warning above the switch condition explains what is incomplete. Click it for details.
Are you on Retail or Forever? Some conditions cannot run there, and others are unavailable while the game hides their value; see Restricted clients.
Still nothing? Run /rm debug glow while you expect a highlight. It names the first link in the chain that stops it: no active rotation, the spell not found on your bars, a condition, readiness, or the glow itself. See Slash commands.

The wrong rotation is active

Check whether you chose one by hand: a manual choice holds until /rm set auto.
Run /rm why: it lists the order automatic switching tries, what it would choose now, and why each other rotation cannot be selected.
Check rotation priorities and switch conditions: your rotations and Built Ins are tried together, highest priority first, and the fallback only when nothing else matches. A Built In with a higher priority wins over your rotation when both match; change either priority. See Switch conditions.

Errors

/rm errors opens a window listing Rotation Master errors, ready to copy. Custom Lua is hidden by default. Include this report when you ask for help.

If a custom condition or function is the cause, its error is listed there too. Fix or disable it on the Conditions or Functions tab.

Saved data looks wrong

/rm check reports problems without changing anything.
/rm repair fixes what it safely can. Export important rotations or your profile first.
Older rotations that lost their owner can be recovered with Recover unassigned rotations on the Rotations tab.

The game feels slow

Raise the Polling Interval in General a little (the default is 0.15 seconds).
Make sure Idle Re-check Interval is not 0, so RM can skip work when idle.
Custom conditions run on every check; keep them simple.
Capture what RM is doing with /rm perf runtime (and /rm perf runtime report), and share the report. See Slash commands.

The code editor will not let me type

Reproduce the problem, then run /rm editorinfo and copy the report. You can also choose a different editor, or plain text, on the Integrations tab.

Asking for help

Discord — the fastest way to get an answer from the author and other players.
Bug reports — for confirmed bugs. Include your game edition, what you did, what you expected, and the /rm errors report.

If your question is about a rotation, share it here or paste its export string, so others can see exactly what you have.