Why? You've run out of Resource Credits
Actions such as posting and voting use computing resources, placing a real cost on the community members who run the Steem blockchain for everyone.
To keep things free, Steem intelligently allocates Resource Credits to each user based on their Steem Power holdings, which can be used to submit a limited number of feeless transactions. When a user runs low on Resource Credits, they will either need to wait for them to recharge, or purchase additional Steem Power. This system prioritizes actions by good community members while limiting spam.
To keep interacting on Steemit:
Buy and hold more Steem Power
Wait until your Resource Credits recharge
Wait until the network usage decreases
Buy Steem Power
Osea quieren dinero. Creo que es muy injusto que a los nuevos nos estén limitando tanto mientras que los que están mejor posicionados no parece afectarles, ¿qué puedo hacer al respecto?, gracias, saludos.