Denver-based Guild, an online worker training platform, offered a hard lesson to its employees Wednesday, telling a quarter of them they would be out of a job. The company didn’t specify the number of workers being laid off when asked. But based on an estimated headcount of 1,200 employees, about 300 people may have lost their jobs. The latest round of layoffs comes a year after the company released 172 workers or about 12% of its workforce of more than 1,400 people.