The entry for error (v) in OED has not been updated since 1891. As such, it's unlikely to include modern usages which arise from computing. Even the Oxford Dictionary of Computing is now six years old, which is rather a long time in the field.
Error is used as a verb. It's jargon, and means "produce an error message" or "fail with an error condition" or some such similar event.
- (verb) What a program does when it stops as result of a programming error.
Because it's computing jargon, it would probably sound out of place when used in other circumstances. It would be incorrect to say that I had errored in constructing this answer.
Computing jargon is generally spelled with American spellings, even in British English. Program and its derivatives are the obvious examples; many languages' verbs are spelled with a -z- spelling (like Oracle's
ANALYZE function). Consequently, even if British English doubled the consonant for errorred it would be unlikely to persist.
In fact, there are rules for the doubling of consonants in English [see another ELU question]. There may be exceptions to those rules, but
- error doesn't appear to be an exception (ends in schwa, so final consonant stays single);
- its usage comes directly from American English (AmE doubles consonants far more rarely);
- there is no separate entry in Wiktionary or FOLDOC indicating a transatlantic difference.