Rockstar has updated its Technical Support page with details on how to overcome some issues currently being experienced by GTA 5 players.
The issues include GTA 5 freezing on a load screen, getting stuck at the container handler in the Port Heist, and overcoming freezing when installing the game.
Here's a few of the issues in full:
Question: Grand Theft Auto V freezes on a load screen when I try to replay a mission. Is this a known issue?
Answer: This issue can occur either during a mission replay of "The Jewel Store job prep" or when retrying the mission after failing when acquiring the pest control van. A possible workaround at this stage would be avoid failing the mission at this particular point or to attempt this mission during the day, as it is possible the issue is caused by a scenario scripted to happen at night time.
Question: During the Agency Heist, the doors to Lester's Garment Factory are locked. How can I proceed?
Answer: This issue may occur if you fail the mission and choose not to retry the Agency Heist Setup. We recommend loading a previous save.
Question: When playing the mission "The Port Heist 1 – Setup", Trevor is getting stuck at the container handler; how can I resolve this issue?
Answer: This issue generally occurs when Trevor runs ahead of Floyd directly to the container handler. We recommend following behind Floyd to the container handler, as this will resolve the issue. If Trevor is currently stuck, reload your previous save game and be sure to follow behind Floyd.
You'll find further GTA 5 support questions and solutions over on the game's support page.