With more people being drawn to the stock market because of GameStop and AMC’s startling success this past week, various popular stock-trading services are experiencing outages as online traders rush to the markets.

According to Down Detector, users have reported problems using E-Trade, Cash App, Ally, Webull and Charles Schwab’s services. The severity of the outages and issues that users are experiencing vary depending on the service, but some are experiencing trouble with placing orders and making transfers.

Webull has received the most reports of service outages, with 1,403 reports as of 9:24 a.m. ET. The most commonly reported problem is a server connection issue.

These services are being stretched thin as the popular finance app Robinhood has restricted transactions on certain stock tickers, including GameStop (GME), AMC (AMC), Blackberry (BB), Bed, Bath and Beyond (BBBY), Express (EXPR), Koss Corporation (KOSS), Naked Brand Group (NAKD) and Nokia (NOK). Robinhood users are only able to close positions on those stocks, according to a Thursday blog post.

People enter a GameStop store in Alhambra, California on January 27, 2021. Frederic J. BROWN / AFP/Getty